Mingsheng Liao 
  
  
Figure 4. 
(a) Fringe from the C-band image pair (b) Coherence image from the C-band image pair 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Matching RMS Error Maximum residual 
algorithm Number of | Range Azimuth | Total RMS Range Azimuth Total 
Points residual 
Only relaxation 155 0.160 0.123 0.201 1.980 0.447 1.985 
matching 
Least Square 152 0.065 0.026 0.063 0.768 0.140 0.781 
Matching 
Table 1. L-band image pair: the comparison of the accuracy with different method 
Matching RMS Error Maximum residual 
alsorithm Numberof | Range Azimuth | Total RMS Range Azimuth Total 
Points residual 
Only relaxation 105 0.096 0.191 0.214 0.971 0.639 0.984 
matching 
Least Square 98 0.035 0.042 0.055 0.229 0.137 0.237 
Matching 
Table 2. C-band image pair: the comparison of the accuracy with different method 
4 CONCLUSIONS 
An efficiency registration approach for InSAR data processing based on multi-step matching is presented. The 
experiment result indicates its promising possibility in InSAR data processing. It appears to be a good compromise 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part Bl. Amsterdam 2000. 
191